| 摘要 |
PURPOSE:To ensure quick judgment of the fruits of astringent persimmon, by projecting visible light beams on the fruits of persimmon without spectroscoping, utilizing the fact that the well matured fruit, in which brown colored tannin cells are yielded, is sweet and the cells absorb the visible light beams, and detecting the intensity of the transmitted light without splitting the light into a single wavelength. CONSTITUTION:When immatured sweet persimmon and matured sweet persimmon are compared, the matured sweet persimmon includes many brown colored tannin cells, and the cells absorb visible light. By utilizing this fact, the visible light is projected on a persimmon fruit C from a light source A through a condenser lens system B. The light passes through a transmitted-light guiding path D. The intensity of the transmitted light is displayed and recorded by a meter G and a recorder H through a photomultiplier E and an amplifier F. Thus the fruits of the astringent persimmon can be judged readily, positively and quickly without destruction. |
